Temperature-controlling system for internal-combustion engines



3. ERICSON.

TEMPERATURE CONTROLLING SYSTEM FOR INTERNAL COMBUSTION ENGINES. APPLICATION FILED Ausu'zs. 191s.

1,3 1,033, Patented Dec. 7,1920;

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.I. ERICSON. TEMPERATURE CONTROLLING SYSTEM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG.23. I913. Patented Dec. 7, 1920.

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60 .cIP

filllli IN: Illll I I I I IIIIIIRIIIJTIIIIIIJJT UNITED STATES- PATENT. OFFICE.

JOHN ERICSON, or'cHIoAGo, ILLINOIS, ASSIGNOR 'ro DON COLE, or o IIoAGo, ILLINOIS.

TEMPERATURE-CONTROLLING SYSTEM FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Application filed August 23,1918. Serial No. 251,090.

To all whom it may concern:

1 3e it known that I, JOHN EmosoN, a c1t1 zen of the United States, residin at Ch1cago, in the county of Cook and tate of Illinois, have invented a certain new and useful Improvement in Temperature-Controllingv Systems for Internal-Combustion Engines, of which the following is a full,

cylinder temperature which is too low for the best economy and efliciency. On the other hand, the usual form which control has so far taken has been to reduce the quantity of water pumped into and through the system which in turn reduced the rapidity of the movement of the cooling water and this frequently resulted in the production of steam pockets or hot spots with all their attendant difficulties and detrimental,

results.

By means of my invention I provide a constant rapid flow of cold water through the lubricating oil well and around the exhaust pipe, two places where an excess of cooling can do no harm, and I provide a substantially closed circulatory system embracing the cylinders and the intake manifold, which closed system I automatically maintain at a temperature which has been determined to be most economical, probably about 185 Fahrenheit and I cause the water in this closed system to be circulated therethrough at a relatively high rate so as to prevent any possibility of steam pockets and to best scour and cover the surfaces constituting the closed conduit. I I accomplish the automatic control of'the cooling system by means of a thermostatically or temperature controlled. valve which drains out a small quantity of the circulatingwater upon. a rise in temperature above the predetermined point, and'to maintain the system full I supply the system from the oil cooling system already spoken of, which oil cooling system I maintain full to capacity at all times. I provide a suction pump for the oil cooling system which constantly draws cold water from a-supply which maybe the water in which the boat Patented Dec. 7, 1920.

driven by the engine is floating, and I also provide a circulating pump for the cylinder cooling system. which maintains a constant and rapid circulation of the water therein and I so associate or inter-relate the two systems that the oil cooling system serves as a constant available supply for the cylinder cooling system to replace with cold or cool water the hot water permitted to esc'a e by the thermostatic control.

y invention will be more readily understood by reference to the'drawings and in which:

Figure 1 is an end elevation of a marine engine embodying my invention in a preferred form;

Fig. 2 is a side elevation of the engine; Fig. 3 is a side elevational view of the intake manifold; and

- Fig. 4 is a bottom plan view of the same.

The engine illustrated is of the twin multiple type having two rows of cylinders 1 mounted on the crankcase 2. The cylinders have a common inlet manifold 3 and each set has its own exhaust manifold 4.

I provide a suction water pump 5 driven by the engine and having a suction inlet 6 for connection to the supply of cooling water, which may be the water in which the boat floats.

The delivery outlet of the pump is connected with one end -7 of the oil cooling coil located in the lower part of the crank case and adapted to cool the lubricating oil. The opposite end of the coil 8 is connected to a stand pipe 10 which rises to the top of the engine and there divides into two branches 11 and 12 which connect directly to the exhaust manifolds 4 of the two sets of cylinders and, through the water jackets of which the water from the pump 5' can return directly to the source of supply.

I also provide a circulating pump 13 also operated by the engine and provided with an inlet 14 and two outlets 15 and .15. pump 13 which in this particular case is The preferably a two-stage centrifugal pump is 'The water circulates through the water space of the cylinder blocks in the usual way, leaving the cylinder blocks by way of the water space 22 of the intake manifold 3, this manifold being suitably water-jacketed as shown in Figs. 3 and 4. The intake manifold 3 is provided with an opening 21 shown in Fig. '4, this opening communicating with the water space of the manifold. The pump 13 is provided with an inlet 14 which leads directly from the branch 12 of the suction pump'delivery by way of the pipe 17, this pipe connecting directly to the branch 12.at 16. The water space 22 of the intake manifold 3 communicates with the return pipe 18 of the circulating system by way of the opening 23, the return pipe 18 entering the connection 17 a little below the branch '12. It will now be apparent that after'circulating through the cylinder blocks and the intake manifold 3 the cooling water is led from the intake manifold to the inlet 14 of the circulatin pump 13 byway of the return pipe 18. hen the engine is runningthe pumps are being operated. The suction pump 5 is drawing water from the source of supply and fprcing it constantly I through the oil and exhaust manifold cooling system and back again to the supply.

'The circulating pump 13 is causing a rapid circulation of water in the closed circulatingsystem, the water entering the circulatory pump 13 by way of the inlet 14.

The pump 13 maintains a circulation of coolm water through the water space of 'the cy inder blocks by way of the outlets 15 and 15', through the cylinder blocks,

through the water space 22 of the intake mani old 3 and back againto the pump 13 byway of the pipe connections 18 and 17 and inlet 14. Until the water in the circulating system becomes too highly heated the operation remains the same.

To control the temperature of the water in,

the cylinder cooling system I provine a thermostatically controlled valve 19 which I arrange to permit the escape of water from the circulatory system upon a rise in temperature above a certain predetermined point. This valve is arrangedin a by-pass 20 a connecting some part. of the cylinder cooling system, such as the manifold 3 to one of the exhaust manifolds 4.1

The valve is carried by and is adapted to be controlled, or opened and closed, by athermostatic device 24 which is adapted to be expanded to open the valve upon a rise of temperature above the predetermined point, and to be contracted and close the valve upon a drop in the temperature of the circulating water below said predetermined point.

The operation is as follows:

When the circulating water rises above a certain temperature, the valve 19 opens to permit some of the hot water to escape as from the intake manifold 3 through the exhaust manifold by way of the bypass 20 and back to the supply.

Any loss of water from the circulating system would be apparent at once by a lowering of the level in the connecting pipe 17 which will be immediately filled by water from the oil cooling system through the branch 12.

In fact the cooling system is incondition at all times to maintain the circulating syscally and efiiciently.

"The method issimplicity itself in its application, and as described, requires very simple apparatus and connections for carrying it into practical operation.

As it is obvious that many modifications of my invention will readily suggest themselves to one skilled in the art I-do not limit or confine my invention except within the scope of the appended claims.

I'claim: v a

1. In an internal combustion engine of the water cooled type a substantially closed circulatory system including the water jackets of the cylinders, a circulating pumpfor causing a constant rapid flow through said closed system. an open conduit including a lubricating-oil cooling coil, a pump for said open conduit for constantly forcing water therethrough, a connection between the closed system and the open conduit whereby any loss of cooling fluid from the closed system is automatically supplied from the open conduit, and temperature controlled means for permitting fluid to escape fromthe closed system upon a rise in temperature above a predetermined point. y 2. In an internal combustion engine having water jacketed cylinders, a closed circulatory systemincluding the water jackets, a circulating pump for causing a constant rapid flow of water through said system. a

temperature controlled valve for causing the extraction of someof the water from said system upon a rise in temperature above a predetermined point, an oil cooling conduit for the engine, a supply pump for causing a constant flow of relatively cool water through the oil cooling conduit, one point r in said oil cooling conduit rising above the highest point in the cylinder cooling system, connection between the two systems at the high point of the oil cooling conduit whereby any loss in the cylinder cooling system is immediately supplied from the oil cooling conduit.

3. 111 an internal combustion engine having water-jacketed cylinders, a closed circulatory system including the water jackets, a circulating pump for causing a constant rapid flow of water through said system, a temperature controlled valve for causing the extraction of some of the water from said system upon a rise in temperature above a predetermined point, an exhaust manifold cooling conduit for the engine, a supply pump for causing. a constant How of relatively cool water through the cooling conduit, and connection between the circulatory system and the cooling conduit for supplying water to the circulatory system from the cooling conduit by gravity.

4. The combination with an internal combustion engine having a circulatory system, of a discharge line normally closed .by a temperature controlled valve, said temperature controlled valve automatically opening said discharge line for the flow of fluid from said circulatory system upon a predetermined rise in the temperature therein.

5. The combination with an internal combustion engine, of a closed'circulatory system, an open circulatory system, means for causing the extraction of some of the fluid from said closed circulatory system immediately upon a rise in temperature to a predetermined point, said open circulatory system serving as a constant available source of supply for said closed circulatory system from which source compensation is thereupon made to said closed circulatory system for the fluid extracted therefrom.

6. In combination, a circulatory system having a normally closed outlet, a circulatory system having a normally open outlet independent of the normally closed outlet of said first system, and means for automati-' cally setting up a flow from said first system through the normally open outlet of said second system upon a predetermined rise in temperature in said first system whereby some of the fluid is discharged therefrom.

7. vThe combination with an internal com-,

traction of some of the fluid from said first system upon a rise in temperature therein to a predetermined polnt, said second circulatory system serving as a constant available source of supply for said first circulatory system from which source compensation is made to said first system for the fluid extractedtherefrom.

8. The combination with an internal combustion engine having water jacketed cylin- 4 ders, a water jacketed intake. manifold and waterjacketed exhaust manifold, of a closed circulatory system including the water jackets of the cylinders and the intake manifold, means for causing the extraction of some of the fluid from said closed circulatory system upon a rise in temperature above a predetermined point, an open circulatory system independent of said first circulatory system, said open circulatory system including the water jacketed exhaust manifold and serving as a constant available source of supply from which compensation is made to said first system for the fluid extracted therefrom.

9. The combination with an internal combustion engine having a circulatory system,

of a normally independent source of supply for said system, and means for automati-- cally setting up a flow of fluid from said normally independent source of supply to said circulatory system, without effecting the normal flow of fluid therethrough, upon a rise in temperature in said circulatory system above a predetermined point.-

In witness whereof I hereunto subscribe my name this 17 day of August, A. D. 1918.

JOHN ERICSON. 

